i got this from a local mechanic friend who since got an Ultra, so i bought this to self diagnose my 99 f250 with a 7.3. but when i try doing any functional tests, contribution, buzz test, glow plug, etc, it times out and "cancels communication" instead of completing them. ive tried with key 20, and 17, both giving the same results. but it will let me scan for codes, and clear them
any help is hugely appreciated!!
any help is hugely appreciated!!